We do not store any payment information ourselves, but work with Stripe, a well established payment gateway used by most websites to hold this information. Stripe is compliant with a number of banking standards, including PCI DSS certificate, and have fraud and chargeback prevention.
Communications between Wisly and Stripe are all secured and encrypted, so once you enter your payment information, we securely transmit it to Stripe, only once, and hold no record of your information. The authorization to charge your card is then stored on Stripe's end, with all the security that they have.